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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
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Kinda off topic...House electrical issue?
I've noticed during moving one of the wall receptacles, that when the
breaker for that circuit is shut off, I'm still showing 17-19vac on my meter. Not exactly sure as to why I'm still showing ac on a circuit that is supposed to be dead. I've checked a few others with the circuit breaker off and they too are showing 17-19 vac. The only thing I can figure is maybe some stray inductance or some sort of system ground problem. I've checked the breakers and everything seems to be fine. 200 amp main with breakers is less than a year old and I've always heard square-D is good stuff. Not sure....Any ideas? Thanks, GW |
#2
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Kinda off topic...House electrical issue?
In article .com,
hk538 wrote: I've noticed during moving one of the wall receptacles, that when the breaker for that circuit is shut off, I'm still showing 17-19vac on my meter. Not exactly sure as to why I'm still showing ac on a circuit that is supposed to be dead. I've checked a few others with the circuit breaker off and they too are showing 17-19 vac. The only thing I can figure is maybe some stray inductance or some sort of system ground problem. I've checked the breakers and everything seems to be fine. 200 amp main with breakers is less than a year old and I've always heard square-D is good stuff. Not sure....Any ideas? Modern high impedance input DVMs are a bit of a pain for measuring household wiring. An old analogue meter with about 1000 ohms per volt is much more use. -- *How come you never hear about gruntled employees? * Dave Plowman London SW To e-mail, change noise into sound. |
#3
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Kinda off topic...House electrical issue?
"Dave Plowman (News)" wrote in message ... In article .com, hk538 wrote: I've noticed during moving one of the wall receptacles, that when the breaker for that circuit is shut off, I'm still showing 17-19vac on my meter. Not exactly sure as to why I'm still showing ac on a circuit that is supposed to be dead. I've checked a few others with the circuit breaker off and they too are showing 17-19 vac. The only thing I can figure is maybe some stray inductance or some sort of system ground problem. I've checked the breakers and everything seems to be fine. 200 amp main with breakers is less than a year old and I've always heard square-D is good stuff. Not sure....Any ideas? Modern high impedance input DVMs are a bit of a pain for measuring household wiring. An old analogue meter with about 1000 ohms per volt is much more use. -- *How come you never hear about gruntled employees? * Dave Plowman London SW To e-mail, change noise into sound. Leakage current in home wiring is often due to the presence of power factor correction capacitors in older flourescent light fixtures, and is quite normal Arfa |
#4
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Kinda off topic...House electrical issue?
In article ,
Arfa Daily wrote: Modern high impedance input DVMs are a bit of a pain for measuring household wiring. An old analogue meter with about 1000 ohms per volt is much more use. Leakage current in home wiring is often due to the presence of power factor correction capacitors in older flourescent light fixtures, and is quite normal. And with most SMPS. However, I was meaning testing with no load. UK house wiring is Twin and Earth - all enclosed within a sheath. This is a good system to keep external fields to a minimum, but allows a degree of capacitive coupling which with a high impedance volt meter gives very misleading results. -- *Can atheists get insurance for acts of God? * Dave Plowman London SW To e-mail, change noise into sound. |
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